instruction stringlengths 31 27k |
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I have read some about Karhunen-Loeve Transform (KLT) and its application to the field of seismic data processing.
The method as I understand it based on decomposing the data (actually mostly used in image processing) using SVD on its covariance matrix and projecting the data back after manipulating one or some of the ... |
I have tried Region based Segmentation - through Seed Growing, Watershed algorithm, and Graphcut algorithm, but none have been successful so far. I am using MATLAB.
|
If a system is given by a transfer function in the $z$ domain that has all poles and zeros inside the unit circle except for a factor of $z^{-1}$ in the denominator (pole at infinity), can it still be considered minimum phase?
If not, how would I create an all pass system to neutralize this pole and obtain a minimum ph... |
I am trying to implement Matlab's cross correlation function but I can't seem to replicate the results obtained when using Matlab's built in function "xcorr".
Documentation for xcorr can be found HERE.
Looking at the Matlab documentation it seems as though the cross correlation is implemented as
$$
R_{xy}[m] = \left... |
In a debate on the value of 24b/192KHz consumer audio (using a good brick wall filter, minimal jitter), a friend posed the argument:
Nyquist never properly dealt with harmonics, which change sound
pressures by riding a higher frequency on a lower frequency "carrier",
increasing the propagation of the higher freque... |
I have 2 vectors, $a$ & $c$, both of length $M$. I know they are related by $a*b=c$. My goal is to recover $b$. Obviously $b = \mbox{deconv} (c,a)$. I am only interested in the first $M$ elements of the convolution (i.e., discarding the last $M-1$ elements). I have two methods of doing this deconvolution in MATLAB and ... |
Summary
I need to remove artifact that appears strongly on all channels in my EEG data. It's already recorded (from another lab) so I can't use hardware solutions. Also: band overlap and no reference channel.
Less Short
I have 28 EEG channels with strong common-mode artifact (artifact amplitude is on the order of $10^4... |
I'm developing an Artificial Neural Network based Speech Recognition System using MFCCs.
Suppose I have 260 input nodes in the ANN, and this number of nodes corresponds to the number of MFCCs that I will use. During feature extraction the number of total coefficients vary with respect to the duration of the sound file.... |
I understand why there need an low pass filter before down-sampling, the sample frequency need to be at least twice of the max frequency signal, else there will be alias issue.
But base on the Wiki page, we need an lowpass filter after up-sampling.
Upsampling requires a lowpass filter after increasing the data rate,
... |
I'm working on a audio sample recognition project, where first you profile a sound and then run the sound detection function.
Currently during the 'profile' stage I'm grabbing copies of the magnitude frequency bin from the sound you want to detect (for a changeable pre-set amount of FFTs). During the detection phase I... |
I am currently reading "A parametric texture model based on joint statistics of complex wavelet coefficients", by Portilla and Simoncelli. In this article, they use the "steerable pyramid" to represent the image. This uses a set of filters to decompose the image in a set of something around 16 subbands in the frequency... |
I have a C# desktop application.
Its purpose is to detect motion changes between consecutive frames.
Currently I am using the excellent Emgu wrapper to OpenCV.
Now, I know this question may seem ridiculous but it is an extreme example to demonstrate best what I mean by the question.
I have a complete white background.
... |
I am working on a eye blink detection project in Matlab. By this moment I have been successfully extracted the images of pupil of eye from the real time video captured via a web cam.
But I am stuck at the process to differentiate the open eye pupil to the closed eye lid state.
Open eye pupil
2.closed eye lid
Could ... |
I have posted this question "Electrical Engineering", but this seems a more appropiate place. I am trying to model a bireciprocal Cauer filter in LTspice but I don't get the expected results. More precisely, using this formula for the coefficients
$\gamma=\frac{re(p_i)−1}{re(p_i)+1}$
where $re(p_i)$ is the realpart of ... |
I am quite confused whether the following numerical differences i find are just severe round off errors made by matlab, or something i am doing wrong. The following happened when trying to see what a low pass filter looks like in the spatial domain.
By mathematics, the inverse fourier transform of a real symmetric imag... |
I've a noisy signal, which is the sound of motor with a constant speed, so the sound "should" be periodic, I know that there is a way to use the autocorrelation function to get the period,I did it, but I can't figure out the period. Any idea how to do that bellow the signal and the result of the autocorrelation :
th... |
Say I have two signals, a(t) and b(t) where the former is the input and the latter in the output. These signals are both recorded by sampling at every 0.01s. The Fast Fourier Transform was applied to both of these providing me with two large arrays of complex numbers. The FFT of b was divided by the FFT of a to provide... |
I have an image taken a night time.
I apply _EqualizeHist to it. But the result is a high level of whiteness running through the image.
This is the image:
I had asked this question in a slightly different way and was given a link to improve the white balancing of the image.
This was the original question
This is that ... |
I have a signal of length 'N' which looks like this
[.......p-set...] [SINE-WAVE] [....q-set...]
amplitude of points in p-set << amplitude of points in sine-wave
Sometimes there are a few sparse points in p-set whose amplitude is comparable to sine-wave points. However, number of such points is much less than the len... |
I have a 10-bit ADC with 8.5 bit ENOB. I have 2.5 quantization levels of thermal noise in front of the ADC. Is there a reason to process more than 8 bits from this ADC?
|
I wish that all those people on that flight were with us, and maybe they still are, as I like to think they are on an island somewhere waiting to us to find them ... however, it does not look good...
Recently, a spy plane searching for possible remnants of Malaysian Flight 370 took this photo:
However they cannot tel... |
I have a problem right now to solve. I have a Gaussian peak, which I need to divide into three components (three Gaussian distribution). For those three component Gaussian distribution, I already know the mean and standard deviation, if I want to do this by using least squares, where should I start with in Matlab?
Than... |
Bit of a long post, but this is a complex topic:
I want to hash of a series of video files so that they can be quickly checked for duplication. I know that any amount of data can be reduced to a hash, but I'd like to do this in a way that is:
Format independent, i.e. not a binary hash, but one based on what you see
Re... |
I have an analog filter with its frequency response curve in dB described by the following expression:
$$
N_{dB}=20log_{10}\omega t_1 \sqrt{\frac{1+(\omega t_2)^2}{1+(\omega t_1)^2}}
$$
This expression is derived from the series connection of two lowpass filters each associated with the following RC circuit:
where, fo... |
I'm trying to find the count of horizontal columns in an ordered image (a sprite image that is used to generate an animated image):
From this image, I'm trying to generate a meta-data file like so:
{
"frames": 12,
"cols": 6,
"width": 102,
"height": 89
}
Frames would be the total count of "elements" in the image, ... |
Is it possible to find time delay of arrival using demodulated signals (of bandwidth ~200hz)? I have a setup in which I receive (multiple receivers, of course) modulated signal from a source. I want to find the angle of arrival of the signal. The signal is amplitude modulated. Due to hardware limitations, cross correla... |
I am sending 6.6Vpp square wave across a narrow-band, 40 kHz Transmitter to a narrow-band, 40 kHz Receiver. I want to find a very accurate distance between the two (sub millimeter).
My assumption so far is that if I can get very consistent results at a fixed distance, that I can calibrate the speed of sound and an off... |
I have many close-range images of a single wind turbine blade (taken from different positions, same angle):
I need to separate the blade image from background like this:
The problem arises in image alignment application where the blade image moves about large amount while the background does not (parallax effect). Th... |
I've started to implement an MFCC algorithm on an embedded DSP, using the CMSIS DSP library. However the results I'm getting don't appear consistent. This is my algorithm so far:
Gather 32ms PCM sample from microphone, 512 samples long. 16000hz
Apply a Hamming window.
Compute the 512 FFT using this.
Compute the magni... |
I have a question related to wavelet transform: we know that while the Fourier transform is good for a spectral analysis or which frequency components occurred in signal, it will not give information about at which time it happens. That's why the wavelet transform is suitable for the time-frequency analysis. It is als... |
I have a set of audio files which contain a word each one, and I'd want to be able to compare a new word (coming from a smartphone mic) to check if it resembles to a specific file and how much it resembles to that audio file. I don't need to know which word it is, or doing a STT system, actually, just checking how simi... |
I have a problem with a FFT analysis in MATLAB, which is probably related to my limited understanding of the fundamentals of Fourier analysis.
I use MATLAB’s built-in fft analysis function.
The sampling frequency is 48000Hz The samples signal is a fairly clean sinus at 3000Hz (se below)
I use a flat top windowing.... |
I am trying to make filters like sepia filter in my app like other photo editing applications , till now I don't have any idea about it , Can any one help me out for it about its algorithms and how to do it ? and Can I implement in opencv using native c++ or we have any of its build in functions ?
|
I have some code that collects amplitudes from a complex sound like a song. I now want to plot a graph of amplitude vs time, for the graph plotting I use JavaFX. However I get about 9 million amplitude shorts for each channel, so how to I select a few samples to plot (as plotting 9 million points is obviously out of th... |
I looked over the other entries regarding peak detection and none seem to answer my question.
I'm working with Fourier spectra of digitized audio that can't be measured again. There are no constraints on the nature of the audio.
Finding outliers is easy. I'm worried about "fat" peaks whose contours might be made jagged... |
Say we have a sampled signal for which the inputs can be out of range. For instance, say a sampled sensor has a range of 0 to 1, and is presented with a time-varying stimulus where a peak occurs with max amplitude 1.2. In the data we would see a saturated or clipped peak.
What are some of the approaches to making estim... |
I am interested in characterising the time-dependent response of a system to a sinusoidal input.
The steady state response of the system is also sinusoidal, however I wonder if there is a standard way to represent the information in a manner that is more detailed than the Frequency Response Function to capture the tran... |
I have been studying carrier frequency offset estimation techniques in OFDM systems. I have understood several of them. when using Pilot tones, as stated in paper (1), the process involves two methods namely: acquisition and tracking modes. a large range CFO is estimated in the acquisition mode while in the tracking m... |
I'm new to DSP and trying to do some example problems for a class and am confused by this one.
Given a data set, and knowing it contains a signal that is a single sinusoid with random content noise, how can I calculate the signal to noise ratio? I also have the sampling rate.
I have been able to plot the autocorrelatio... |
I am interested in removing oscillations from a signal to capture the lower-frequency variations, similar to the objective of this problem. The oscillations vary in frequency in the time domain, so wavelet shrinkage seems to be a reasonable option, but most of the literature on wavelet shrinkage is applied to denoising... |
What could I say about stability of those systems by looking at the scheme?
System 1
System 2
$y_r(s)$ is input, $a(s)$, $b(s)$, $p(s)$, $q(s)$ and $r(s)$ are some polynomials and $y$ is output.
I calculated tranfer $\frac{y}{y_r}$ and it's the same for both systems.
$$\frac{y}{y_r} = \frac{r(s)b(s)}{a(s)p(s)+b(s)q(s... |
it is a couple of weeks that I am thinking about the following: I have a tool which is able to simulate the dynamic behavior a steel tower exhibites due to the coupled action of wind and waves. Currently, to damp the oscillations, I am controlling the acceleration of the tower top by means of a standard feedback loop.
... |
I have an array x of length 1024 (stored as 16 bits integers, named for example np.int16 in numpy/python), i.e. the size of x is 1024*2 = 2048 bytes.
(Remark : x comes from an audio .wav file, stored as 16 bits integers, as it is very common. But it is also very common to interpret it as a float array, with values in $... |
I have c# desktop application and I am using emgu framework as a wrapper for OpenCV.
I am trying to sharpen an image because the input images are not great.
I tired a technique I found via searches that suggest from the original image:
I take a copy and blur it.
I then take another copy of the original and invert it.
... |
let us suppose that we have following signal values,which consists by deterministic components and random noise(white noise)
56.69
75.24
13.77
8.56
-12.88
-65.34
-45.33
-48.78
-22.23
54.12
83.77
11.84
2.31
39.59
-32.09
-88.86
5.45
50.24
-37.39
-35.69
38.62
7.06
-30.01
22.36
60.71
30.96
5.90
-38.91
-58.15
-40.87
-13.... |
If I want to measure entropy of an image how should I do it?
My aim is to ignore things like tree leaves moving in the wind with my C# desktop application.
I know matlab has this functionality but I cannot see it within Emgu which is what I am using.
I got as far as finding 'Shannon Entropy' is probably the way forward... |
when it comes to digital I/Q signal power measurement we know that this power is viewed as $I^2+Q^2$ (as its polar form). This is the power as referred to final analogue signal. Yet the IQ modulator does not convert I/Q to polar form, instead only the final I is output to real world say in the RF modulator.
When I mode... |
I conducted a research on how to implement a QPSK demodulator. I found out the Quadrature QPSK demodulation technique which seems very straight forward. Here is what i understood from the explanation of the block diagram, and would like to confirm from this platform if my understanding is right. From the block diagram... |
If I have the following power spectral density of the quantization error can I tell that quantization noise is approximately white? Can you please provide some justification?
|
I want to know the performance of a deconvolution algorithm with different CN, so I'm convolving my signal with different convolution matrices(different CNs) and then applying the deconvolution algorithm, then the error between the original and reconstructed signals is measured.
Is there a proper way to create the conv... |
ECG signal is affected by interferences such as the Powerline Interference, Baseline Wandering and Muscle Noise.
There are many filters available which can reasonably cancel these types of noise.
I've found that Butterworth, Chebyshev, Wiener and Kaiser filters, along with wavelets could be used for this purpose.
Now, ... |
I'm currently working on a digital audio OFDM project and found that even if I explicitly specified the same sample rate (11025 Hz), the transmitter and receiver still differ slightly in it(lesser than 1 Hz). My professor asked me to use a 'multirate interpolating filter' to synchronize the two sample rates. Could you ... |
My understanding of jpg compression is that, if done repeatedly, any image will eventually be reduced to a single flat color, due to the way it deals with neighboring pixels. However, years ago I was told that mp3 does not have this problem, a 192kbps song will stay at the same audio quality with little file size varia... |
I created a data signal and calculated the spectrum via the fft-command in MATLAB. The data-signal itself is not periodic but it is created in a way that it can be treated as one period of a periodic signal. The last sample smoothly transitions to the first one. I observe that the absolute of the spectrum strongly depe... |
I'm creating a three-dimensional model of the earth based on SRTM height data. The data set is pretty huge, so only a small fraction of the data is available at any given time.
The height data is organized in 1° x 1° tiles which come in different resolutions (from 1x1 to 1200x1200, roughly in power-of-two steps). For v... |
I am interested in understanding the mathematical reason for why does applying a median filter on an image (or signal) result in reduction of noise.
|
I have a friend working in wireless communications research. He told me that we can transmit more than one symbol in a given slot using one frequency (of course we can decode them at the receiver).
The technique as he said uses a new modulation scheme. Therefore if one transmitting node transmits to one receiving node ... |
I have a friend working in wireless communications research. He told me that we can transmit more than one symbol in a given slot using one frequency (of course we can decode them at the receiver).
The technique as he said uses a new modulation scheme. Therefore if one transmitting node transmits to one receiving node ... |
Given $ M \in \mathbb{R}^{N \times N} $ which is a Positive Definite Matrix.
Let $ \hat{x} $ the MMSE of $ x $ given $ z $, namely $ \hat{x} = \mathbb{E} \left[ x \mid z \right] $.
Prove the equivenalce of the following expressions:
$ \arg \min_{\hat{x}} \mathbb{E} \left[ {\left( \hat{x} - x \right)}^{T} \left( \hat... |
I want to implement the following algorithm. Let $I$ denote noisy image and for each pixel of $I$ is represented by $I(x,y)$. A Sliding window of size $3\times3$ centered at $I(x, y)$ is defined. At first we estimate that the center pixel of window is noise or not. To differ the noise and signal, we calculate... |
I am finding the techniques to remove unwanted regions (small dots) from image. I have an image that includes object and some unwanted region (small dots- see first image). I want to remove it. Hence, I use some morphological operator example 'close' to remove. But it is not perfect. Do you have other way to remove mor... |
Let us suppose that we have modeled signal using AR model, and suppose we have following model:
I used spectral estimation function from MATLAB
pyulear
Now frequencies are given in normalized frequencies and I would like to know how to convert them back to real frequencies? From there it is clear that we have four de... |
I have a C# desktop application.
I am using a wrapper to OpenCV which is EMGU.
I am just performing a basic motion detection operation.
I am using component labelling and 2 frames differencing to determine motion changes. I am also using an averaging background approach to update the background which i use to 'subtrac... |
I am interested in spectral resolution of spectral estimation methods.
Can you point me to some good literature, videos or books from which i can read and study?
I want to understand how to resolve two closed spaced sinusoids:
$$
x_1(t) = \sin(\omega_1 t + \phi_1) \\
x_2(t) = \sin(\omega_2 t + \phi_2) \\
$$
where $\o... |
I am trying to implement an algorithm in real-time on a Fixed point DSP (The Blackfin from Analog Devices). The algorithm does a lot of stuff, but in the middle it performs an algorithm called "Fast Data Projection Method" (FDPM), which goes something like this:
Let $\mathbf{x}_{k} = [x_{1}, x_{2},\dotsb,x_{M}]^{T}$ be... |
i'm trying to filter a signal with a FFT. I window each block of signal (i use a 4096 points signal) and then remove some high frequencies by just multiplying the magnitude response.
the result is : the more i remove highs, the more i have glitches.
I know it's bad to EQ directly with the FFT but i just want to know wh... |
I currently run real time audio through an FFT and the library (vDSP) returns magnitude and phase values (polar coordinates) for data in the FFT bins.
Does the bin with the highest magnitude always represent the fundamental frequency?
What exactly can the phase of the frequency bins be used for in regards to audio? Wha... |
i am trying to implement a short time fourier transform of an audio signal to do some filtering (subtract another stft signal using spectral subtraction). I am using a hamming window function with 50% overlap. Additional the size of my FFT is twice the window size, zeros at the end of the signal in time domain.
mic i... |
I have an image with its type is 16 bit signed. I see some paper, the author often convert it to unsigned 8 bit. But they did not explain why they do it. Could you explain what is benefit of this work? And How to implement it by matlab code?
|
let us suppose that we some signal $x(t)$,which consist of sinusoidal components and white noise,i would like to know how to use chirp z transform for improving spectral resolution?i found this article about chirp z transform
http://prod.sandia.gov/techlib/access-control.cgi/2005/057084.pdf
also similar arti... |
I am planning to implement a pattern matching algorithm using something like correlation as a matching metric.
I know that the template I am going to use will, if present, have different sizes in the target images. The interval of sizes might be something like :
x 0.5 , x 0.75 , x 1.0 , x 1.25 , x 1.5 , x 2.0 of the or... |
Hello there I am a Student.
I need to know how to find the Natural and Total Response of the given system:
where: $x(t)=e^{-t}u(t)$ and $y(0^+)=2, \dfrac{d}{dt}y(0^+)=3$. (If the image above is not clear)
This is for my exam preparation, please kindly help or at least specify where
I can find the solution for this ... |
Coming from a photogrammetry background, I am quite familiar with camera calibration, and the common assumptions that are used for crowd-sourced images (i.e. center point in the middle of the image, pixel resolution from the EXIF data etc.).
But I have been wondering a maybe naive question lately: Can I calibrate a ma... |
It is well known that a moving average algorithm done in the time domain is equivalent to a filter with frequency response $\mathrm{sinc}(\omega\tau)$ where $\tau$ is the averaging time. (see this related answer)
This has the following beneficial property: you are streaming a time series of data ${x_n}$, and the averag... |
I'm going over the W3 PNG specification (creating a PNG library from scratch) and I've finally found how to create a green 1x1 image.
Now I'm trying to create a bigger image of mixed Red, Green and Blue pixels. Let's say a 4x4 image. Sadly I'm getting all the pixels mixed and some of them are Black or Pink.
Details:
S... |
What is the 2D version of Shift Theorem?
|
I have a C# desktop application. I am using EMGU as a wrapper for OpenCV.
I am receiving images in JPEG format that were originally taken by an analogue camera.
The quality of the image is poor (compared to digital cameras).
I want to see if I can use filters/methods derived from OpenCV/EMGU that could enhance the imag... |
I'm a CS who took an internship at an EE shop, and I'm trying to do some work developing in house and client applications for a chip designer, and I'm having some fundamental communication problems. Mainly I shore up any applications they need developed from their specs, including at the moment a tool that demonstrates... |
IS there a Matrix form of the STFT that could be applied to a signal directly, as in the case of DFT? We know the matrix structure of the DFT Matrix. Can we derive that somehow for a STFT Transform? The parameters that I wish to use are
N = signal length
R = frame length
overlap = 50%
DFT length = K
Attempt: I have t... |
I'm not sure if is the correct location for ask this question. If not please info me the correct StackExchange site.
As this wikipedia page show, there is one YUV format of image as YUV420 and YUV411.
I know what is YUV, but what those 420 and 411 means?
|
Suppose you have a system, H, that you want to estimate its transfer function.
You have a finite number of complex input samples, x, and noisy complex (magnitude and phase) output samples, y:
In practice, how do you estimate it's transfer function given a mean-squared error criteria?
What algorithms are used to estima... |
I am using Matlab Simulink to analyse Amplitude Modulation in Noise. I attached my system below.
My problems:
1)In the mixer I am using a bandpass filter and another one after the envelope detector and I need to determine the minimum and maximum frequencies allowed depending on these parameters( I attached screenshot... |
Is 999e3 in matlab = 0.999? Because I am not sure whether e mean exponential or you move the decimal point by 3decimal places
|
I have noticed that there is an identical pattern between two signals:
one is a signal of n identically spaced samples over a single period of a sinusoid
the other is a signal constructed of the real component of the second (i.e. first periodic) Fourier bin of n circular shifts of the signal, so pseudocode would be:
al... |
let us suppose that we have non stationary signal,whose value is given by
56.69
69.22
-2.19
21.80
9.85
-80.51
-56.28
-18.79
-14.32
12.26
74.71
67.37
24.43
-9.05
-47.30
-62.60
-47.64
-26.36
20.78
67.58
49.83
28.24
25.14
-43.10
-72.81
-17.82
-12.38
-34.82
58.96
69.83
-5.10
14.65
28.29
-64.48
-61.23
26.43
1.90
-47.52
51.... |
We are performing a convolution of audio signal, with 511th order FIR
filters, using fast convolution methods: overlap-add or overlap-save.
Filters are being designed in frequency domain several thousand times
per second. Filters need to be zeros padded to be used in order to be
used in fast convolution algorithms, so ... |
Let STFT[frame, freqbin] be the short-time Fourier transform of some audio data.
(here frame is the index in time, and freqbin is the index in frequency).
Very often, STFT[k, f0] will be close to STFT[k+1, f0]...
... then it could be interesting to store, for each frequency bin f0, only the differences :
STFT[0, f0],... |
I understand that this has something to do with difference between refresh rate of monitor (or line frequency used by the ballast in case of Fluoroscent lamp) and frame capture rate of video recorder.
When learning about DSP in the past, I vaguely remember that a certain difference in frame capture rates of video recor... |
I am trying to solve the following equation for h (an [MxM matrix]):
$$
k[\tau_1,\tau_2]=\sum_{i_1=0}^M \sum_{i_2=0}^M h[i_1,i_2]x[\tau_1-i_1]x[\tau_2-i_2]
$$
I have k, which is a 2D [MxM] symmetric matrix & I have x which is also a 2D [MxM] symmetric toeplitz (autocorrelation) matrix.
I know this is basically a 2D dec... |
what are the applications of Fourier transform in modulation ? What are modulation schemes that use Fourier transform? I guess, FSK & PSK are related to Fourier transform since it both have frequency and phase in their names respectively.
|
I need to study a wave file for every 100 Hz. However, I dont know how can I design filer for each 100 Hz. Let's say 0-100 Hz, 100-200 Hz, ... , ((fs/2)-100) _ (fs/2) Hz.
Is it any MATLAB code for it ?
How many samples are needed for bandwidth of 100 Hz ? I maen how should calculate it ?
Please guide me.
Thanks.
|
I'm making a project connected with identifying dynamic of sales. That's how the piece of my database looks like:
There are free columns:
Product - present the group of product
Week - time since launch the product (week), first 26 weeks
Sales_gain - how the sales of product change by weeks
In the database there is 3... |
I am currently doing a project on sound signal processing by using MATLAB. I have a problem regarding creating the command line so that I can get a graph containing frequency by its time. But this graph is the result of an audio input.
example:
x = audioread('samson.wav')
But I still can't get this kind of a result.... |
I have two force-time signals obtained from a couple of force plates, corresponding to input/output signals for some system. Plotting the two together one of the first things I noticed was a time delay. Initially I used cross correlation to gain some approximation for this feature however now I look a little closer I r... |
let us consider following matlab code
help aicbic
aicbic Akaike and Bayesian information criteria
Syntax:
[aic,bic] = aicbic(logL,numParam,numObs)
Description:
Given optimized log-likelihood function values logL obtained by fitting
a model to data, compute the Akaike (AIC) and Bayesian (BIC)
in... |
NOTE: This is a question that another user has been trying (unsuccessfully) to ask. Because the multiple questions asking, essentially, the same thing have either been deleted by me (because they were duplicates of each other) or by the user, I have tried to ask the question in such a way that will help the user and i... |
Basically the same as this question, but it was never really answered: Stereo sound separation into three sources
Imagine I have a really trivial signal:
Left: 100Hz tone + 200Hz tone + 500Hz tone
Right: 500Hz tone + 1kHz tone + 2kHz tone
I'd like to perform some operation where I can decompose Left and Right into L'... |
I am working on tracking an object in a video by using its color. what i did is that i have converted the color of a selected object into LAB color space since it is a uniform color space. and then in each frame of video i am searching for same color by finding color difference in LAB color space. Now main problem is a... |
You know that a sine corresponds to a pulse by J.Fourier transform. The lower is the frequency, the closer is the pulse to the origin. A constant signal is a sine (or cosine, that may be important) of frequency 0. It is a pulse in the origin. This is ok, since we know very well that a pulse transforms to the white spec... |
Is 1.0e-03 * 0.9734 equivalent to 0.9734 * 10^-3 = 0.0009734 ? Because I am not sure
|
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